Control knob



FIG. 1 is a front perspective view of a control knob showing our newdesign;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a side view taken from the left of FIG. 4;

FIG. 6 is a side view taken from the right of FIG. 4;

FIG. 7 is a top view thereof; and

FIG. 8 is a bottom view thereof.

The ornamental design for a control knob, as shown and described.